ISPConfig3 Integration into other systems

I would like to integrate ISPConfig3 into our billing system. I do not need the remote SOAP framework which appears to be only partially complete.

What I would like to do is figure out a method to remotely log into ISPConfig as a user. I can supply the user login / password from the billing system to match what ISPConfig3 has, but it appears the authors have taken significant steps to break any methods of doing this.

Can someone provide some insight as to how I might open ISPConfig3 via a remote login ?

The integration has to be done with the remoting API, so you either have to wait until it is finished or you finish it yourself as ISPConfig is a opensource project. Logging in as a ISPConfig user is not an option.

Hello mike_p,
What I meant was if there is already a plugin/some code that already do that work or is it plan to develop that feature (billing system with paypal). I know there is everything in the database.